text: MAGS involves the extraction and analysis of soil vapor from a piezometer screened through the unsaturated soil column for the purpose of locating unsaturated zone source material.  According to the MAGS Manual, written by HSA and adopted by the Florida Department of Environmental Protection, MAGS is performed "by utilizing a typical regenerative blower fitted to a temporary soil vapor extraction well, [such that]a large volume of soil can be assessed with a limited number of samples.  While lacking the resolution of traditional soil sampling methods (e.g., discrete soil sampling, low flow active gas sampling, etc.), the statistical representativeness (in the sense of sample coverage) of MAGS results versus traditional methods is much greater.  Moreover, the results of the assessment provide useful transport and exposure assessment information over traditional techniques.  Lastly, MAGS is effective as both an initial site assessment and remedial assessment tool, in that, MAGS directly yields data required for remedial design."